type 'List<String>' is not a subtype of type 'List<Map<dynamic, dynamic>>' of 'function result' code example

Example: type 'List' is not a subtype of type 'List'

snapshot.data.documents.map<Widget>((document) {
  return new ListTile(
    title: new Text(document['name']),
    subtitle: new Text("Class"),
  );
}).toList()